Hi

linode 512
ubuntu 10.04.1 LTS
nginx 0.7.65
php-fpm
xcache (http://xcache.lighttpd.net)



User agents:

Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html) - normal crawling, etc.
Mediapartners-Google - adsense checks, etc.




We have lots of 499's on our log...
It seems the mediapartners bot is getting the 499 and then 2 seconds later retries and gets the 200 OK?

What is 499? host unreachable?

Culprit = xcache? but no errors on the xcache control panel, no OOM (out of memory)...

66.249.71.186 - - [11/Jan/2011:13:19:13 +0000] "GET /blog/post155.html HTTP/1.1" 499 0 "-" "Mediapartners-Google"
66.249.71.186 - - [11/Jan/2011:13:19:15 +0000] "GET /blog/post155.html HTTP/1.1" 200 8114 "-" "Mediapartners-Google"

When browsing our own website using Firefox, Chrome, Opera, etc.... I don't experience any errors, normal browsing as expected, website speed is ok...

Thanks in advance for any info.

according to this site, nginx returns a 499 error when the client unexpectedly terminates a connection (after having sent a 200 in the headers already). if it only happens to Google's bots then it's most likely a problem on their side, so I wouldn't worry.

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nope